Installation Instructions

Document No. 540-566
Installation Instructions
April 10, 2008
Wiring Diagrams
24 VDC
POWER
SUPPLY
4-20 mA
SENSOR
ENTIRE CIRCUIT
MUST BE ISOLATED
WITH NO EARTH GROUND,
INCLUDING THE 4-20 mA
SENSOR
-+
-
+
TEC0429R3
ANALOG INPUT
TERMINATIONS
Each 4-20A sensor requires a SEPARATE, dedicated power limited 24 VDC power supply.
DO NOT use the same transformer to power both the sensor and controller.
CAUTION:
Figure 6. Special Wiring Requirements for
4–20 mA
Sensors.
CAUTION:
The controller’s DOs control 24 Vac loads
only. The maximum rating is 6 VA for each
DO. Use an interposing 24 Vac relay module
(such as P/N [550-054, 550-048, 550-050,
550-052, 540-147]) for any of the following:
• VA requirements higher than maximum
• Separate transformers to power the load
• Power limited Direct Current (DC) power
requirements
The 24Vac relay module and the circuit
described in Figure 6 are not applicable for
smoke control application.
24 V-AC
TX
RX
FLN
TRUNK
+ - S BST
RTS
DO 1
NO C
DO 2
NO C
DO 3
NO C
DO 4
NO C
DO 5
NO C
DO 6
NO C
DI 3
AI 3
DI 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
ROOM TEMPERATURE SENSOR
SPARE AI (100K THERMISTOR ONLY); OR,
SPARE DI (DRY CONTACT CLOSURE ONLY)
WALL SWITCH (OPTIONAL)
FAN
COMPRESSOR
REVERSING VALVE
ELECTRIC HEAT (OPTIONAL)
TEC2070WD-SR1
C H
Y1 G
Y2
DAMPER
ACTUATOR
CW
COMMON
CCW
Figure 7. Applic
ation 2070 (Single Compressor Heat Pump with Reversing Valve Control).
Siemens Building Technologies, Inc. Page 5 of 6